What’s Vulnerable › Vulnerabilities

CVE-2025-10539: Improper TLS Certificate Validation RCE via Malicious Update in DeskTime Time Tracking App

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-28 · updated 2026-10-07
• Weakness: CWE-295

Description

Due to improper TLS certificate validation in the DeskTime Time Tracking App before version 1.3.674, attackers who can position themselves in the network path between the client and the DeskTime update servers can return a malicious executable in response to an update request. This allows the attacker to achieve user-level remote code execution on the affected client.

Affected products

• DeskTime Time Tracking App: before 1.3.674 — fixed in 1.3.674

How to fix

Upgrade to a fixed version: DeskTime Time Tracking App 1.3.674. Check the vendor advisory for mitigations.

References

• https://desktime.com/download
• https://r.sec-consult.com/desktime
• http://seclists.org/fulldisclosure/2026/Apr/20
• http://seclists.org/fulldisclosure/2026/Apr/21
• https://sec-consult.com/vulnerability-lab/advisory/missing-tls-certificate-validation-leading-to-rce-in-desktime-time-tracking-app/

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